He’s worn a suit a few times while delivering a paper at a conference, or at a fancy fundraiser.
Stipulating that we accept this as canon, why should we accept it as an excuse for him being a jerk?
What’ll be weird is that
A) Given how quickly Sheldon learns (when he’s motivated) and
B) Amy’s apparently a great motivator for Sheldon
Amy and Sheldon may have the best/most stable relationship by the time this is done.
The bit where Sheldon said (approximately) “Hey Amy, I was too hasty in dismissing your ideas, so I set up a brunch to surprise you.” is such a huge evolution for better for Sheldon’s character.
I loved the bit with Bernie and Howard in bed. “You have a baby in there!” “Oh, that’s where I put it.”
They must do something with Raj. He is becoming a fifth wheel and it’s borderline creepy.
I’m glad to see Sheldon evolving. Remember the flashback episode where he freaked out because Leonard bought a couch so they could have people over?
I really liked Penny and Leonard at the convention. His story circle was hysterical.
Because we have a higher tolerance for crazy people being jerkish in the real world. But more importantly in the world of sitcoms it’s because Sheldon is funnier when he does it.
It needed more people, but I agree. In my experience, even the worst attended con would have more people than that wandering around. Although I have heard stories…
I wonder what deep, dark trauma inflicted by Beverly is responsible for Leonard’s need to make change for people?
Heh 
I’d give this one just to some early boyhood geekiness that made him want to have the little change gadget. The other geeks at the con picked up on that quality. I could see Howard doing something like that by building a change making robot. Seems too mechanical for Sheldon though, maybe when he was 5 he would have tried to build a change teleportation device.
I wanted Penny to bite the head off the guy who refused to believe she’s married to Leonard. It was insulting to her as well as him. Also, she supposedly loves Leonard, right? It would have taken things in a different direction, but I’m sure the writers could have found some humor in her standing up for her marriage.
It would have made more sense for Sheldon and Amy to just have Stuart over for practice-brunch. The other two were a not-funny distraction … which could have been funny if they had hit it off and left together.
I think she was having fun with the ridiculousness of it all. Plus, it gave Leonard the opportunity to brag.
And she did say she thought the change maker was hot.
When I was a kid, I wanted a change maker like that. Not that I ever needed one. I just thought it was cool somehow.
One of the teenagers I work with at the grocery store bought one of those change makers at an antique store. He was so proud of it, was buying change to put in it and everything.
Oh, almost forgot my favorite line. Penny on the highlights of her acting career: The Apest, my hemorrhoid commercial. . . the list does not go on!
Hey now! You missed Serial Ape-ist 2: Monkey See, Monkey Kill and…well, okay, that is all you missed. But still! 
We do?
He is?
She did a couple other things. Leonard, Sheldon, and Amy went to see her in A Streetcar named Desire (Sheldon was disappointed by the lack of streetcars), and didn’t she sing in one episode and she was terrible?
Stuart used to be the cool, self-confident one, remember? He is getting himself back after a long string of horribly bad luck.
I still feel like Penny is missing the mark though. She’s lost that sweetness and naivete that made her an attractive person.
The terrible singing was in her single performance of Rent.
It was just a showcase performance. Usually those are the songs with little of the dialogue. They assume the people watching are familiar with the show. She also did The Diary of Anne Frank above a bowling alley, although the way she always says it, it sounds like the whole title is The Diary of Anne Frank above a Bowling Alley. Maybe she can use that as the title for her memoirs.
She sucked in Streetcar, although Leonard thought she was really good. I don’t know if she was supposed to be bad, or Kaley Cuoco, who can act (I’ve seen her in other things) just can’t do Tennessee Williams.